<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<a href="a.html">a</a>
<a href="b.html">b</a>
<a href="c.html">c</a>
<a href="d.html">d</a>
<a href="e.html">e</a>
<h1>b</h1>
<input type="button" value="<--" onclick="history.back()">
<input type="button" value="-->" onclick="history.forward()">
</body>
</html>